This USB Type-A to serial DB9 adapter with RS-232 tester from Delock combines two functions in one device. The RS-232 connector provides a connection for serial printers, testers, machines etc. In addition, the nine LEDs in the connector simultaneously indicate the status of the RS-232 data and of the USB power supply. The RS-232 tester can be used for troubleshooting and is an aid in analysing the serial control and data lines. Specifications https://elecena.pl/product/18366259/90497-usb-converter-a-to-rs232-esd-status-leds-2-m 2021-05-06 https://elecena.pl/product/18366259/90497-usb-converter-a-to-rs232-esd-status-leds-2-m 2022-01-06 https://elecena.pl/product/18366259/90497-usb-converter-a-to-rs232-esd-status-leds-2-m 2022-09-18 https://elecena.pl/product/18366259/90497-usb-converter-a-to-rs232-esd-status-leds-2-m 2023-07-23 https://elecena.pl/product/18366259/90497-usb-converter-a-to-rs232-esd-status-leds-2-m 2026-07-20